[gnome-session] gsm_systemd_new: Check for logind, not for systemd

[Martin Pitt <martinpitt src gnome org>]

commit f11fde2c8ddc7ce361a62fc47aea68b114c0df17
Author: Martin Pitt <martinpitt gnome org>
Date:   Thu Mar 21 11:06:03 2013 +0100

    gsm_systemd_new: Check for logind, not for systemd
    
    It is possible to build systemd without logind or run logind without systemd
    init, in both cases testing for systemd init with sd_booted() is wrong. Check
    for /run/systemd/seats instead, as recommended by systemd upstream.
    
    For details, see:
    <https://mail.gnome.org/archives/desktop-devel-list/2013-March/msg00092.html>
    
    Drop the now unnecessary linking against libsystemd-daemon.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=696262

 configure.ac                |    2 +-
 gnome-session/gsm-systemd.c |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c3870f8..92b459d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,7 +115,7 @@ AC_ARG_ENABLE([systemd],
               [enable_systemd=auto])
 
 PKG_CHECK_MODULES(SYSTEMD,
-                  [gio-unix-2.0 libsystemd-login >= 183 libsystemd-daemon libsystemd-journal],
+                  [gio-unix-2.0 libsystemd-login >= 183 libsystemd-journal],
                   [have_systemd=yes], [have_systemd=no])
 
 AC_MSG_CHECKING([whether to use systemd])
diff --git a/gnome-session/gsm-systemd.c b/gnome-session/gsm-systemd.c
index 68d8988..ae29800 100644
--- a/gnome-session/gsm-systemd.c
+++ b/gnome-session/gsm-systemd.c
@@ -33,7 +33,6 @@
 #include <pwd.h>
 
 #include <systemd/sd-login.h>
-#include <systemd/sd-daemon.h>
 
 #include <glib.h>
 #include <glib-object.h>
@@ -879,7 +878,8 @@ gsm_systemd_new (void)
 {
         GsmSystemd *manager;
 
-        if (sd_booted () <= 0)
+        /* logind is not running ? */
+        if (access("/run/systemd/seats/", F_OK) < 0)
                 return NULL;
 
         manager = g_object_new (GSM_TYPE_SYSTEMD, NULL);